Method of cutting shingle strips



Nov. 18, 1924. 1,516,238

C. W. MORTIMER METHOD OF CUTTING SHINGLE STRIPS Filed Feb. 1, 1922 J2 59 f6 47 6/ 4J I Fig. 11.

-I' 1 X i J] J a 8 11 8 H l INVENTOR ing materia UNITED vs'rivrss-PATENT OFFICE. I

CHARLES W. MORTIMER, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE BARRETTCOMPANY, A CORPORATION OF JERSEY.

METHOD OF CUTTING SHINGLE STRIPS.

7 '0 all whom it may concern:

Be it known that I, CHARLES W. MOR- TIMER, a citizen of the UnitedStates, residing at Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements in Methods ofCutting ShingleSt-rips, of which the following is a specification.

In the art of manufactured roofing it is 1. old to form strips ofroofing material having tabs along the edge that is to be exposed forthe purpose of simulating the appearance of individual shingles whenthey strips are installed on a roof. On account of the expansion andcontraction due to weather conditions it is impracticable to makethestrips of very great length, thus :necessitating that the strips be laidin horizontal rows with the ends abutting and. thus leaving a joint thatmust be protected from leakage. This requires the successive layers tobe overlapped so that about 250 square feet of material is required tocover 100 square feet of roof. By the present invention a considerable"saving is efi'ected by providing shingle strips of such shape that agreater proportion of material is provided near the joints, or one endof the strip is made wider so as to provide better protection for thejoints that occur in horizontal rows. The shingle strips will beinstalled so as to break the oints along the wider portions of the,

shingle strips.-

The invention will be understood from the description in connection withthe acicompanying drawings, in which- Flg. 1 is a plan view showing howthe shingle stri s are cut from a sheet of roofig. 2 indicates the wayare installed on a roof. v In Fig. 1 of the-drawings a sheet. 1 ofroofing material is indicated and is so. cut alongthe lines 2, 2 etc.,the lines 3, 3 etc, the lines .4, 4 etc., the lines 5, 5 etc. and thelines 6,- 6 etc. that with a sheet of roofmg material as wide as the sumof the narrow and the wide portion of-a shingle strip, sets of shinglestrips consisting of three shingle strips 8, 8,8 of the same size andshape are produced by thisinvention, and one shingle strip 9 is also cutout of the sheet of roofing material the same shape as those heretoforeknown.

the shingle strips In cutting the roofing sheet 1 along the lines 2,-6,the individual strips 8 will be so formed that the narrow portion istwice as long as the wider portion of each strip 8. This can be done bymaking the cuts along the lines 4 twice the length of the cuts along thelines 6 and by spacing the lines 2 on one side of the sheet 1a distanceapart equal to three-fourths of the length of the lines 4, beginningone-fourth the distance from the end of one of the lines 4, and byspacing the lines 3 along the other side of the sheet 1 the samedistance apart, beginning at the middle point Qfrt'he lines- 6. V Thelength of the lines 2 should preferably be about one-fourth the lengthof the narrow portion of the strips. In this way, there is no waste ofmaterial due to cutting out the shingle strips. Instead of having theroofing sheet 1 the width indicated, the same may be two or more timesthis width without any wasteof material.

As a specific example, it may be men tioned that with a roofin sheet 1of a width of 18 inches, the cuts ay be made along lines so that thenarrow end of the strips is 8 inches and the wider end 10 inches inwidth, while the length of the narrow portion may be two-thirds of 32inches and the length of the wider portion one-third of 32 inches,making the shingle strips each 32 inches long. The straight edges of thestrips that are to be exposed to the weather may be provided withnotches, or in case roofing material of .the ordinary kind with mineralsurfacing layers thereon is used, the portions 8 to be exposed may beornamented in various ways to im rove the appearance, such for exampleas y heating with a hot implement along certain lines to bring theasphalt through the stone surfacing, or by pressing with'an implementwhile the asphalt is hot, or by applying small strips at properintervals, or by providing stone surfacing of different colors instreaks thereacross, or by printing with difierent colors,

/ When the shingle strips are installed, the

first row will be laid,-as indicated in Fig.

2, with the wider ends all turned in one direction, the nexthorizontalrow may be overlapped so as to expose one half the width ofthe narrow portion, the 'oints of the second row" being spaced from t ejoints of the first row a distance equal to one-half the no length ofthe wider portions ofthe shin 1e stri s, and so on continuously to covert e roo an auxiliary layer being, of course, laid under the first row asis usual to begin at the eaves.

By makingthe ends of the strips wider,

- as indicated, the most dangerous part with regard to leakage, namely.the joints, is rendered safe and 13 of material is saved with thedimensions 7 above enumerated.

I claim 1. The process which comprises cutting two sets of parallelslits longitudinally of.

a sheet of roofing material, said sets being staggered and one setsubstantially twice as a sheet of roofing material, said respective Isecting the middle of said slits.

5. The process which comprises cutting two sets of parallel slitslongitudinallyjof a sheet of roofing material substantially halfwaybetween two parallelstraight edges of said strip, said sets of slitsbein staggered,

series being ofl'set from each other and the slits of one series beingsubstantially twice as those oftheother, and cuttin said s settransversely along lines space of said slits.

)4. The process which comprises cutting q two series of parallel slitslongitudinally of f a sheetof roofing material said respective seriesbeing offset from eac other and the slits of. one series'beingsubstantially twice as long as those of the other, and cuttingsaid sheettransversely alonglines spaced}; apart distances equal to the averagelength of'saidslits, said lines on oneside interf,

and one set being substantial y twice as? long as the other.

ture.

.a -T apart distances equal to the average length In testimony whereof Iafin my signa- CHARLES W. MOTIMEB. f.

